Particle size in microns
of



T W 506g DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published atthe request of the applicant or owner in accordance with the Notice ofApr. 11, 1968, 849 O.G. 1221. I119!!- tification is by serial number ofthe application and the heading indicates the number of pages ofspecification, including claims, and of sheets of drawing contained inthe application as originally filed. The file of this application isavailable to the public for inspection; reproduction may be purchasedfor 30 cents per sheet.

Applications published under the Defensive Publication Program have notbeen examined as to the merits of alleged invention. The Patent Oflicemakes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED JUNE 24, 1969 863 O.Gr. 1000 TOBACCO SMOKE FLOW A tobaccosmoke filter element containing alumina hydrate particles of less thanabout two microns in size for removing a high amount (up to about 70percent) of the total particulate matter found in the efliuent stream oftobacco smoke,

June 24, 1969 G, P. Tou ET AL D F. pus,

HIGH EFFICIENCY, ADDITIVE-TYPE TOBACCO SMOKE FILTER 3N 7 Original FiledOct. 26, 1967 TOBACCO TOBACCO SMOKE SMOKE FLOW FLOW PERCENT REDUCTION O5 IO i5 PARTICLE SIZE IN MICRONS OF AL O 3 H O GEORGE P. TOUEY FIG.3

CEPHAS H. SLOAN INVENTORS ATToimEYs

